Exploration of Energization and Radiation in Geospace

Exploration of energization and Radiation in Geospace (ERG)[1]
Mission type Astronomy
Operator JAXA
Spacecraft properties
Bus SPRINT
Launch mass ~350 kg
Power ≧700 W
Start of mission
Launch date 2016 (planned)
Rocket Epsilon
Launch site Uchinoura
Orbital parameters
Reference system Geocentric
Perigee ~300 kilometres (190 mi)
Apogee ~33,200 kilometres (20,600 mi)
Inclination 31 degrees
Period ~580 minutes
Instruments
  • Extremely high-energy electron sensor (XEP-e)
  • High-energy particle sensor - electron (HEP-e)
  • Medium-energy particle sensor - electron (MEP-e)
  • Low-energy particle sensor - electro (LEP-e)
  • Medium-energy particle - ion (MEP-i)
  • Low-energy particle - ion (LEP-i)
  • Magnetic Field Experiment (MGF)
  • Plasma Wave Experiment (PWE)
  • Software Wave-Particle Interaction Analyzer (S-WPIA)

Exploration of energization and Radiation in Geospace (ERG) is a planned research satellite that will be used to study the Van Allen belts. JAXA is developing the mission, which is scheduled to be launched on December 20, 2016, aboard Epsilon launch vehicle.[1]

Spacecraft

The ERG spacecraft is the second satellite based on SPRINT bus, after Hisaki (SPRINT-A). ERG weighs about 350 kg, measures about 1.5 m × 1.5 m × 2.7 m at launch.[2] Once in orbit, it will extend four solar panels, two 5 m masts, and four 15 m wire antennae.[2] The spacecraft is spin-stabilized at 7.5 rpm (8 seconds).[2]

Planned mission duration is one year of scientific observation, with extension if possible.[2]

Instruments

ERG carries following instruments:[2]

MGF is located at the end of 5 m extended mast.[2]

PWE consists of a search coil (PWE-MSC) located at the end of another 5 m exteded mast, four 15 m wire antennae (PWE-WPT), and associated electronics unit (PWE-E).[2]

S-WPIA will analyze the data obtained by other instruments.[2]

See also

References

  1. 1 2 3 "Exploration of energization and Radiation in Geospace (ERG)". JAXA. 2012. Retrieved 2013-09-08.
  2. 1 2 3 4 5 6 7 8 プレスキット/2016年11月18日（木） (PDF) (in Japanese). November 18, 2016. Retrieved November 27, 2016.


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